Over 10 billion years ago a race of beings started the long hard path to evolution on the planet
Oa. In time they would become both mentally powerful and essentially immortal.

Constantly striving for betterment there was only one mystery of the universe the Oans had not
discovered, its very origin. Although forbidden, the scientist Krona delved into the origin to the universe
only to release energies which would result in the creation of the Multiverse.

Every planet in the cosmos now had a multitude of almost identical counterparts existing in other
dimensions, except for Oa, which was balanced by the planet and dimension of Qward, which gave birth to an
evil so great that it caused a
Crisis on Infinite Earths.

Post-Crisis

Little is known about the planet occupying the center of the known universe before it was colonized by
Maltusians.

Their home planet stressed to the breaking point by overpopulation, war and the misuse of their formidable
mental powers, the Maltusians spread across the galaxy.

One group settled upon a planet within the center of the universe known as Oa.
In time, members of this group would split off on their own creating three distinct species. Two species
would leave Oa; the Controllers, founders of the Darkstars, and the Zamarons female warriors and possessors
of the Star Sapphire.

The remaining colonist from Maltus would turn their mental energies toward the task of protecting all
life as the Guardians of the Universe.